Chair-seat-perforating machine.



PATENTED DEC. 12, 1905.

6 SHEETSSHEET l.

Snow Vim Uhafies L .Lin calm O Y a skc e 0. L. LINCOLN. CHAIR SEAT PBRFORATING MACHINE.

APPLICATION FILED MAY 29. 1905.

willmeoaeo W No. 807,295. PATENTED DEC. 12, 1905. G. L. LINCOLN.

CHAIR SEAT PERFORATING MACHINE.

APPLICATION FILED MAY 29, 1905.

6 SHEETS-SHEET 2.

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C. L. LINCOLN.

CHAIR SEAT PERFORATING MACHINE.

APPLICATION FILED MAY 29, 1905.

6 SHEETS-SHEET 3.

, vwawfo'c ChafleslIlS {7 0070 v @HomwqQ iva names No. 807,295. PATENTED DEC. 12, 1905.

. G. L-LINGOLN.

CHAIR SEAT PERFORATING MACHINE.

APPLIOATION FILED MAY 29. 1905.

6 SHEETS-SHEET 4.

No- 807,295. PATENTED DEG. 12,1905.

0. L. LINCOLN.

CHAIR SEAT PERPORATING MACHINE.

APPLIGATION FILED MAY 29, 1905.

6 SHEETS-SHEET 6.

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f 5 w w W affomwl UNITED STATES I ATEN'I."v OFFICE.

CHARLES L. LINCOLN, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE A. H. NILSON MACHINE COMPANY, INC., OF BRIDGEPORT,

CONNECTICUT.

CHAIR-SEAT-PERFORATING MACHINE.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed May 29, 1905. Serial No. 262,854.

To aZZ whom it may concern.-

Be it known that I, CHARLES L. LINCOLN, a citizen of theUnited States, and a resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Chair-Seatmachine for perforating wood veneer in the form of chair seats and backs, &c. Seats and backs of this particular class are usually formed of three or more thicknesses of wood veneer glued together, with the grain of the alternate layers arranged at right angles, and

' are obviously formed in various sizes, the central portion being slightly concaved and provided with a series of perforations of special design usually representing in its entirety a circular figure. Heretofore more or less difficulty has been experienced in drilling the perforations of the articles of this class by reason of the veneer splitting and otherwise becoming defaced. Besides a large number of holes are usually included in the design of a single seat, the drilling of which holes requires a great amount of labor and time.

It is the object of the invention to provide a machine that will perforate chair-seats and similar articles of the'above class successfully and quickly, to construct the machine in the simplest possible manner consistent with the work to be done, and to make it automatic in all its operations.

In the carrying out of my invention I have designed a holder to receive and support a number of chair-seats and have provided means for adjusting the same to accommodate seats of different sizes, to include devices for automatically and successively feeding the seats therefrom to perforating mechanism, which comprises a press having novel dies so arranged and designed as to produce a cleancut hole with little or no bur or splitting of the veneer, and, further, to includemeans for removing the finished seat from the dies and machine.

With the above and other minor objects in view my invention resides and consists in the novel construction and combination of parts shown upon the accompanying sheets of drawings, forming a part of this specification, upon which similar characters of reference denote like or corresponding parts throughout the several figures, and of which Figure 1 shows a front elevation of my chair-seat-perforating machine with its seatholder shown in section. Fig. 2 is a rear view of Fig. 1, the legs of the machine being broken away, as are also the link connections for the feeding mechanism. Fig. 3 is a central vertical longitudinal section taken on line 3 3 of Fig. 1. Fig. 4 is an enlarged plan view of the bed of the machine, together with the adjustable-seat-holder and a portion of the feeding mechanism for moving the seats from the holder to the punching-dies. Fig. 5 is an enlarged central vertical sectional view taken on line 5 5 of Fig. 4, showing a pile of seats in the holder and the feeding mechanism in the act of moving a seatforward to the perforating-dies. Fig. 6 is a further enlarged detail sectional view of the punches and dies as illustrated in Fig. 5, but with said punches in their lowered position. Fig. 7 is an enlarged detail front elevation of the perforating-dies illustrated in Figs. 5 and 6. Figs. 8 and 9 show in plan view a seat before and after it has been perforated, respectively. Fig. 10 shows an enlarged detail sectional view of a slightly-modified construction of bushings which are designed to form a taper or countersink around the hole in the veneer.

Referring in detail to the characters of reference marked upon the drawings, A indicates the table of my machine, which. as shown, may be supported upon legs the usual way and has extended upward therefrom a suitable frame, (indicated by B.)

Transversely across the rear of the machine and journaled in bearings C of the frame is a driving-shaft D, carrying upon one end a tight and loose pulley E and F and a balancewheel G. To the opposite end of this shaft is a pinion H, which meshes with and drives a large gear I, mounted in a transverse shaft J, journaled in bearing of the upper portion of the frame B. This shaft contains a crank intermediate of the side portions of the frame, which is connected by an adjustable link K with the vertical reciprocating slide L, mounted in ways M M, secured to the inner sides of the frame B. The large gear I is designed to normally run loose upon the shaft J and is provided with a clutch mechanism N of any suitable or preferred design, connected by a rod 0 with the foot-lever P in such a manner as to throw said gear into operative engagement with the shaft J at the will of the operator, thus effecting an operation of the slide when desired. From the foregoing mechanism it will be noted that reciprocating movement is imparted to the slide from the driving-pulley through the shaft D, the gears, and crank-shaft at such times as when the clutch N of the big gear I is in engagement, thus obtaining either a single operation of the slide and dies or a succession of them, as

desired. g 7

Upon the table A of the machine I provide a bed Q, which is secured thereto by screwbolts R and is suitably perforated to allow the scrap from the punches and dies to pass therethrough. Upon this bed is attached a bottom die-plate S by means of screws T. This plate contains a series of punch-holes U, with bushings V of any desired size and shape and arranged in any preferred designas, for instance, that shown in Figs. 4 and 9. The bushings are formed of hard tubular steel driven into the plate, but projecting slightly above the same, as shown, and may have either a flat engaging surface, as seen in Figs. 5 and 6, or a bevel face, as seen in Fig. 10. The holes of the bushings obviously register with the holes in the plate, and those in turn register with suitable openings W in the bed.

X indicates the punch-carrier, which is secured to the head of the slide L in any suitable wayas, for instance, by means of screws Y.

' This punch-carrier is preferably formed of two plates.

The upper one serves as a back for the heads of the punches and the under one as a punch-support. The punches Z are formed with a broadened head on their upper end to abut against the back and fitted in an enlargement of the holes in the support, so as to retain them against withdrawal. As previously stated, these punches may be of any preferred size and are necessarily arranged in design and positions to register with the holes of the bushings in the bottom die-plate.

Z represents a clamping and stripping plate, which is loosely attached to the under face of the carrier by means of screws a and has a series of springs 1) arranged between it and said carrier in a way to normally hold said clamping-plate in an extended position and insure a yielding engagement of its bushings with the seat in advance of the punching operation. The under side of this clampingplate is provided with a series of bushings 0, similar to and corresponding in position to the bushings in the bottom plate, through which the punches of the carrier operate. These bushings, like thoseof the bottom plate, also project slightly from the clamping-plate to engage the stock surrounding that to be punched, thus preventing any splitting of the stock or formation of burs. By the use of slightly longer bushings having a tapered or beveled operating-face V, as seen in Fig. 10, I am enabled to produce a countersink around the hole formed in the seat. This clampingplate also serves as a stripper with the upward movement of the punches and by reason of the punches moving up through and in advance -of the plate. Theclamping-plate in shape and design is similar to the under dieplate and must necessarily operate true therewith to insure the correct registration of the punches with the holes of the bushings, and with this in view I have provided a pin d on each side of the die-plate S. which pin extends up vertically through holes of the clamping-plate to form guides therefor and insure a true vertical reciprocation thereof. From the foregoing detachable attachment of the die and punch plates it will be seen that the same can be readily removed and others of different size and design of perforations substituted, if desired.

The holder to receive and support the chairseat 11/ will be best understood from Figs. i and 5, which show, respectively, a plan and sectional elevation of the same. This holder is made adjustable to accommodate differentsize seats, is formed principally of angle-iron, and preferably supported upon the bed Q.

In detail it consists of two supporting side members 6 e, forming ways for the seats a, and with their inner ends attached by screws to either of the sets'of holes 1) in the lugs f of the bed, so as to set the said ways, at predetermined distances apart. To the outer end of these sides is adjustably attached a transverse strip g, having a series of holes q in either end for the engagement of screws in the strip. Intermediate of and longitudinal with the sides 6 is a middle support inattached at one end to the before -.mentioned strip g and the other to a lug dof the bed by means of screws. Four guide-posts j and j, formed of angle-iron, are secured to the bottom sides a at proper distances apart, braced by corner-plates k, and further provided with adjustable transverse bracing-strips Z fore and aft, as clearly appears. Each of the side ways is provided with a series of holes 0, to which the posts j and their plates are detachably connected and whereby said posts are made adjustable with respect to the inner posts j, thereby accommodating seats of different lengths. In this connection it will also be apparent that the series of holes q and p in the strip 9 and the lugs f allow the sides to be adjusted to and from each other, thus accommodating seats of different sizes.

The veneer seats to be punched usually come untrimmed, but have substantially square corners that readily engage the channels of the angle-posts when placed therebetween and are free to move down by gravity as the bottom ones are successively removed by the feeding a seat therebetween.

device to be explained. The inwardly-disposed portions of the inner angle-posts y" do not extend down to engage the bottom or horizontal portion of the side member 6, thus leaving an opening it under the inner portion of each of said corner-posts to allow but one seat to be moved from the holder at a time, as shown in Fig. 5, by feeding mechanism which will next be described.

To the bed Q and on each side of the dieplate S is attached a bracket 7%", in which is fixed a guide-rod 0, extended outward to approximately the length of the seat-holder, and upon each of these guide-rods is arranged a reciprocating bracket 19, to which the opposite ends of the slide (1 are attached, said slide being arranged beneath the seat-holder, having fingers s adjustably secured thereto for the engagement of the bottom seat in the pile. Each of the brackets 12 is connected by a link t with a lever u, secured in a frame 0), attached to a rocker-shaft w, journaled in a bracket 00, secured to the back of the frame B of the machine, the rocker movement being imparted to said shaft from the crankshaft J through an eccentric y,.link z, lever a, and arm Z), attached to said rocker-shaft.

From the foregoing construction it will be seen that with each complete rotation of the shaft J a forward and back movement will be imparted to the slide or feeding device in a manner to engage and shove or feed forward the bottommost one of the pile of seats contained in the holder, so as to bring it in proper position beneath the punches, and that with the successive movements of the seatfeeding device the previously-punched seat will be shoved out from under the punchers by the incoming seat, and to insure its further and final delivery from the machine to an endless beltor other receptacle (not shown) I have provided mechanism at the rear to engage such seat and properly clear it from the punches, so as to prevent it interfering in any way with the successive operations. This removing device is supported upon the bed Q, by means of brackets 0', which has journaled therein an upper and lower shaft d and e, respectively, each carrying a pair of rolls f to engage the seats and each having a small gear g meshing with each other in a way to operate one shaft from the other and in a way to cause said shaftand rolls to turn in and draw This upper shaft may also be provided with a pair of springs it (see dotted circles, Fig. 4) to normally hold the rolls in engagement with each other. The lower shaft is preferably provided with a sprocket 2", connected by the chain Z5, bearing an idler/a, with a larger sprocket Z upon the hub of the fly-wheel Gr. It is connected in a way to cause the rolls to engage and draw out a seat when shoved forward by the feeding device.

Having thus described my invention, What .raised bushings therein through which the punches operate, and springs for normally holding said clamping-plate in an extended position with relation to the ends of the punches.

2. A chair-seat-perforating mechanism,

comprising-a dierplate having raised bushings therein containing punchholes, a gang of punches to operate in said holes, a clampingplate with extended bushings through which the punches operate, means for normally holding the plate extended with its bushings below the ends of the punches and devicesto permit the plate to yield and tooperate the punches therethrough and into the bushings of the lower plate.

3. A chair seat perforating mechanism, comprising a die-plate with a series of holes therethrough, raised bushings surrounding such holes, a clamping-plate, bushings in said clam ping-plate, punches mounted in the bushings of said clamping-plate, and means to insure a firm engagement of said bushings with the chair-seat in advance of the engagement of the punches.

4. In achair-seat-perforating machine, the combination with a seat-holder and feed mechanism, of perforating mechanism comprising a die-plate with a series of holes thereth rough, raised bushings in such holes, a clampingplate having holes therein, bushings mounted in the holes of said clamping-plate, a carrier bearing punches adapted to be operated through the bushings of the clamping-plate, and means to insure a firm engagement of said bushings of the chair-seat in advance of the. engagement of the punches.

5. Chair-seat-perforating mechanism, comprising a die-plate with holes therethrough, raised bushings in such holes a punch and carrier, a plate under the carrier, extended bushings in the carrier-plate through which the punches operate, springs intermediate of the carrier and die-plate to normally hold said plate and its bushings in an extended position to insure the engagement of the bushings with the seat in advance of the punches.

6. In a chair-seat-perforating machine, the combination with perforating mechanism, comprising a die-plate with a series of holes therethrough, raised bushings surrounding such holes, a clamping-plate with bushings therein, punches operating through the bushings of the clamping-plate, of a holder comprising parallel ways to direct the seats into said perforating mechanism, angle-iron corner-posts to retain the seats upon the ways, a slide beneath the ways with means for reciprocating said slide and successively feeding a seat through the Ways to the perforating said slide to feed the seats from the holder to mechanism. the perforating mechanism.

7. In a chair-seat-perforating mechanism, Signed at Bridgeport, in the county of Fairthe combination with perforating punches and field and State of Connecticut, this 27th day of 5 dies,1 of a seat-holderadjacent thereto, feedifiigl May, A. D. 1905.

[Dec ianlstn compllslng a pair 0 para 6 x 1 1 guide-rods attached to the fixed perforating- LHARLES LINCOLN die, a slide mounted upon said rods With \Vitnesses:

means for successively engaging the seats in C. M. NEWMAN, 10 the holder, and mechanism for reciprocating G. E. MOSTON. 

